【作者】 姚晴林； 姚武； 张学深；

【Author】 YAO Qing-lin, YAO Wu, ZHANG Xue - shen (Hefei Industrial University, Anhui 230009,China; Xuchang Relay Research Institute, Henan 461000,China)

【机构】 合肥工业大学电力系； 许昌继电器研究所；

【摘要】 保护相间短路的模拟式功率方向继电器内角α的整定值只有两个(30°、45°),用户只能在这两个值中选其一;分析并提出了保护相间短路的微机型功率方向继电器内角α的准确整定计算公式,用户可以整定α为该公式的计算值或至少为最合理的值,从而能显著提高方向继电器的动作灵敏度及可靠性,具有新见解及应用价值。更多还原

【Abstract】 There are only two set values(30°,45°)for interior angle a of the stimulated directional power relay as the protection in phase to phase short circuit fault. An accurate setting formula for interior angle a of the microprocessor- based directional power relay as the protection in phase to phase short- circuit fault is proposed and analyzed,users can set a as a calculation value or at least an optimum in the formula. Therefore the operation sensitivity and reliability of the directional relay would be improved greatly.The opinion is new and practical.更多还原